Longze Cross Recessed Countersunk Wood Screws | DIN 97 / ISO 7050 / ASME B18.6.1 | Stainless Steel (SS304 / SS316) & Zinc Plated Timber Screws
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Product Title
Longze Cross Recessed Countersunk Wood Screws | DIN 97 / ISO 7050 / ASME B18.6.1 | Stainless Steel (SS304 / SS316) & Zinc Plated Timber Screws
Product Summary
Longze Cross Recessed Countersunk Wood Screws are precision-engineered fasteners manufactured to DIN 97 E ISO 7050 standards, widely used in high-end cabinetry, furniture assembly, joinery, and
timber framing. Featuring a flat countersunk head and a Phillips (cross) drive, these Longze Cross Recessed Countersunk Wood Screws allow for a perfectly flush or recessed finish in wood surfaces, providing a
smooth aesthetic and preventing snagging in functional applications.
✔ Flush Surface Integration: The 90-degree (Metric) or 82-degree (Imperial) head angle ensures the screw sits level with the timber surface for a professional, clean look.
✔ High-Efficiency Cross Recess: Designed for rapid installation with power drivers, the Phillips (cross) drive offers better centering and reduced slippage compared to traditional slotted drives.
✔ Specialized Timber Threads: Deep-cut, sharp threads are engineered to grip wood fibers tightly, providing superior pull-out resistance while minimizing the risk of splitting the grain.
Key Features of Cross Recessed Countersunk Wood Screws
Self-Centering Point – The sharp gimlet point ensures an immediate start upon contact, keeping the screw aligned during the initial drive.
Smooth Shank Design – Longer sizes feature a smooth upper shank that allows the "top" board to be pulled tightly against the base material for a gap-free joint.
Superior Material Grades – Available in Case-Hardened Carbon Steel for general use and Marine Grade SS316 for extreme outdoor or coastal environments.
Global Standard Compliance – Fully compatible with Metric (DIN/ISO) E Imperial (ASME) woodworking specifications for international projects.
Technical Specifications
Standards: DIN 97 / ISO 7050 / ASME B18.6.1 / JIS B1112
Metric Size Range: 2.5 mm to 10.0 mm (Diameter)
Inch Size Range: #4 to #24 (Diameter)
Length Range: 10 mm to 200 mm
Drive Type: Phillips (Cross Recess) / Pozi / Torx
Finish: Zinc Plated (Clear/Yellow), Black Oxide, Brass Plated, Plain
- Material & Mechanical Propertie
Materiale Grado Tensile Strength Feature Applicazione Carbon Steel C1022A (Hardened) 450 to 600 MPa High Surface Hardness General Carpentry / MDF Acciaio inossidabile SS304 (A2) $\ge 500$ MPa Rust Resistant Decks / Kitchen / Bath Acciaio inossidabile SS316 (A4) $\ge 600$ MPa Acid/Salt Resistant Marine / Coastal Structures Solid Brass H62 / H65 Medium Decorative/Anti-Spark Antique Furniture Restoration
- Standard Dimensions (Metric DIN 97 - Phillips Type)
Size (d) Head Dia (dk max) Head Height (k max) Shank Dia (ds) Phillips Drive No. 3.5 mm 6.50 mm 1.93 mm 3.5 mm PH2 4.0 mm 7.50 mm 2.20 mm 4.0 mm PH2 5.0 mm 9.20 mm 2.50 mm 5.0 mm PH2 6.0 mm 11.00 mm 3.00 mm 6.0 mm PH3
- Surface Treatment
Coating Process Salt Spray Applicazione Yellow Zinc Electroplating 72 to 144h Indoor Furniture / Yellow Pine Hot-Dip Galvanized Molten Zinc 500 to 1000h Outdoor Fencing / Heavy Timber Brass Plated Electroplating 24 to 48h Decorative Interior Trim Black Oxide Chemical 24 to 48h Modern Interior Design / Optics
Applicazioni di Cross Recessed Countersunk Wood Screws
Furniture & Cabinetry: Invisible joints in wardrobes, tables, and high-end kitchen units.
Decking & Flooring: Securing timber planks where a flush walking surface is mandatory for safety.
Joinery & Carpentry: General-purpose fastening of door hinges, lock plates, and window frames.
Boat Building: Using stainless steel variants for interior cabin fittings and deck hardware.
DIY & Home Improvement: Mounting wall brackets, shelves, and wooden home decor.
Installation & Usage Guidelines
Pre-Drilling & Countersinking: For hardwoods and critical aesthetic joints, use a combination pilot bit and countersink to ensure the head sits perfectly flush without splitting the wood.
Drive Alignment: Ensure the Phillips bit is fully seated and perpendicular to the head to prevent "cam-out," which can damage the drive recess and the wood surface.
Treated Lumber Caution: Always use Acciaio inossidabile O Hot-Dip Galvanized screws in pressure-treated timber, as the chemicals can rapidly corrode standard zinc-plated fasteners.
Torque Setting: When using power drivers, set the clutch to a low-to-medium level to avoid over-driving the screw into soft woods, which can lead to "spinning" and loss of holding power.
Quality Control & Logistics
ISO 9001 Certified production with automated optical inspection for head concentricity and drive depth.
Bend Testing: Every batch is tested to ensure the screw can withstand a 30-to-45 degree bend without fracturing, ensuring the steel isn't too brittle.
Thread Sharpness Test: Verification of the gimlet point to ensure immediate wood fiber engagement.
Packaging:
Bulk 25kg Export Cartons
Fumigation-Free Pallets
Custom retail packaging (Small boxes, Window-packs, or Tubs) available
Q: When should I use Pozi drive instead of Phillips? A: Pozi drive provides extra engagement points for better torque, but Phillips (Cross Recessed) is the global standard for machine-driven assembly. Longze can provide both depending on your regional preference.
Q: Can these screws be used in MDF? A: Yes, but because MDF is a composite material, we recommend a pilot hole to prevent the edges of the board from bulging or splitting under pressure.
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